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    A statistically significant lack of debris discs in medium separation binary systems

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    Author
    Yelverton, Ben
    Kennedy, Grant M
    Su, Kate Y L
    Wyatt, Mark C
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2019-09
    Keywords
    binaries: general
    circumstellar matter
    
    Metadata
    Show full item record
    Publisher
    OXFORD UNIV PRESS
    Citation
    Ben Yelverton, Grant M Kennedy, Kate Y L Su, Mark C Wyatt, A statistically significant lack of debris discs in medium separation binary systems, Monthly Notices of the Royal Astronomical Society, Volume 488, Issue 3, September 2019, Pages 3588–3606, https://doi.org/10.1093/mnras/stz1927
    Journal
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
    Rights
    © 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We compile a sample of 341 binary and multiple star systems with the aim of searching for and characterizing Kuiper belt-like debris discs. The sample is assembled by combining several smaller samples studied in previously published work with targets from two unpublished Herschel surveys. We find that 38 systems show excess emission at 70 or 100 mu m suggestive of a debris disc. While nine of the discs appear to be unstable to perturbations from their host binary based on a simple analysis of their inferred radii, we argue that the evidence for genuine instability is not strong, primarily because of uncertainty in the true disc radii, uncertainty in the boundaries of the unstable regions, and orbital projection effects. The binary separation distributions of the disc-bearing and disc-free systems are different at a confidence level of 99.4 per cent, indicating that binary separation strongly influences the presence of detectable levels of debris. No discs are detected for separations between similar to 25 and 135 au; this is likely a result of binaries whose separations are comparable with typical disc radii clearing out their primordial circumstellar or circumbinary material via dynamical perturbations. The disc detection rate is 19(-3)(+5) per cent for binaries wider than 135 au, similar to the published results for single stars. Only 8(-1)(+2) per cent of systems with separations below 25 au host a detectable disc, which may suggest that planetesimal formation is inhibited in binaries closer than a few tens of au, similar to the conclusions of studies of known planet-hosting binaries.
    ISSN
    0035-8711
    DOI
    10.1093/mnras/stz1927
    Version
    Final published version
    Sponsors
    Science and Technology Facilities Council studentship; Royal SocietyRoyal Society of London
    ae974a485f413a2113503eed53cd6c53
    10.1093/mnras/stz1927
    Scopus Count
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    UA Faculty Publications

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